2. After translation, the pre-mRNA undergoes multiple modifications. a. Create an imaginary pre-mRNA transcript that has completed all post translational modifications except splicing. Draw exons as thick rectangles and introns as thin rectangles. Give your gene at least 4 exons. Label each exon and each intron. b. From your pre-mRNA drawing above create 3 different mature mRNAs. c. On your drawing above, for each mature mRNA, provide a brief explanation of how the mature mRNA was formed. d. What will happen to these mature mRNAs? .